There's a contradiction in your rules of etiquette. You offer us rule no 2 then admit to breaking it in the next rule. In my opinion, your rules are too stringent and intricate to expect the entire community to follow. If etiquette is more tolerant then everyone can have a more enjoyable experience.
People who break etiquette do not deserve etiquette in return. If you bully a bully it is not bullying. It is defense. These aren't rules. What is so stringent about not cheating, not being a jerk?
I mean same can be said about the winning player. He's just punishing those who don't resign 'gracefully', or he just wants to be blunder proof, which you cant possibly blame.
He hit me so I hit him back!!